Apache
Apache is an open-source cross-platform webserver, which is used on over 100million websites. It was created by Robert McCool and the Apache Software Foundation in 1994. Now it is used on more than 66% of the million busiest websites (according to Netcraft).
This section includes articles on installing and modifying Apache, using the .htaccess file. This file is located in the root folder of a domain/subdomain or in any other folder where direct integration with Apache is needed. It can be used to modify php.ini values which control how PHP is used on the server and it is very useful for setting up password-protected directories, turning compression on/off and handling redirects.

Above: Apache Webserver running on Ubuntu 7.10
